Plaster-board lath



.INOV 6 J. ,SCHUMACHER PLASTER BOARD .LATH

Filed Nov. 14 .1921

Examiner Patented Nov. 6, 1923.

'i tiamina' JOHN SCHUIACREB, F LOS AIUGEPESN, CALIFORNIA;

BLASTER-BOARD LATE.

Application iled November 14, 1921. Serial Io. 614,915.

To allwho'mzt may concern:

Be it known that I, Joint SorrUMAcrmn,

ater ma ortland cement as water a citizen of the United States, and resident .t u same to set. With this treat: of Los Angeles, in the county of Los An- I: it n 4 l: emeIt-'lbonnd 6 geles and State of California, have invented Board Laths, of which the following is a specification.

This invention relates to an article of 10 manufacture for use in building constructions as a substitute for metallic or wooden lath. It comprises a boardutowthejaeeno boar, which `laster be applied tg prducethe paper is rough with de ressions and elevanished) allsur accl tis an object of this tions, producing in e ect a scratch coat i5 invention't provide a board which is reyou which the plaster may be laced. In proof, strong, durable and will permit nail- 1g. 2 the plaster applied to the Ecard is inmg without cracking or injuring the board! dlcated by 8. It is a further object of this invention tol The board may be made continuously by provide a board which has a surface of Such;l supplying the cement to two advancing n the shav s when solid. e savings` new and useful Improvements in Plasterrwmixed ta 60 1 l Y g l character as to offer an effective grip to the` sheets of aper in the manner that plaster plaster applied thereto, whereby the plaster l board ma e of gypsum plaster as a core and when set is firmly anchored to the board so "5 coverings of paper is ordinarily made. as to produce in effect a single body. iAfter the board in its green state has These objects together with other objects iemerged from the machine and partially set,

`Il and corresponding accomplishments are obithe upper sheet of paper may be pulled from tained by means of the embodiment of my the board, exposing the cement face. While invention lillustrated in the accompanying `@the cement is moist, the paper and cement drawing, in which: are not bound together and the paper is Fig. 1 is a perspective view of a section of easily removed.

plaster board lat and Fig. 2 is a section Itis obvious that Ihave provided a board through the board with a finish coat of ,fwhich is lire-proof by reason of being plaster applied thereto, the view showing a )formed of cement. It has solidity that is frzgment of the board on an enlarged scale. not present in a gypsum plaster, and will leferring more particularly to the drawnot absorb moisture and soften as will gyping, the board comprises a backing of pa r sum board. The board is not so hard but that 3 with a cementitious body 4 thereon. he it mayr be nailed, and the weight is not expaper and oementitious body are' of such cessive. It is obvious that a very eicient character 'that they adhere to one another. scratch surface isprovided for plaster, which 'ghe edges og tlle lloard may le reiieficed is 'ilslefflsthe finishing cat. h hm 40 turnin ac te aperan em e vin ar eate wit etoreity in the bdy as indicriited by 5 and 6. Aung-u move the Nia-L other expedient which may be resorted to is the pores of the ces'Tieingr'edetspresf the placing of reinforcement, such as wire ent iii the p''f the untreated wood preor netting, indicated by 7. vent the cement u n .m g a bond with I prefer to form the body of the board of the wood. c

a mixture of ortland cement and wooden plrosityof the wood and cement may enter own i shavin As 1s we ortlan t erein.

mewill not bind or adhere to wood which What I claim is: r is untreated. For this reason I first trea '1. A composition for use in laster board com Va body formed o cement and w shavmgs treated to increase their poosity. Y l

2. The process of compounding a composition of matter comprising a mixture of ce- 106. COMPOSITIONS,

COATING 0R PLASTIC.

wood shavings with slaking lime, mixing the treated shavmgs with cement, and allowing the mixture to In witness that I claim the foregoing I have hereunto subscribed my name this 8th day of Novem set.

ber, 1921.

JOHN SCHUMACHER. 

